fools2022/calc_hash.py

#!/usr/bin/python3

charmap = {
    ' ': 0x00,
    '0': 0xA1,
    '1': 0xA2,
    '2': 0xA3,
    '3': 0xA4,
    '4': 0xA5,
    '5': 0xA6,
    '6': 0xA7,
    '7': 0xA8,
    '8': 0xA9,
    '9': 0xAA,
    '!': 0xAB,
    '?': 0xAC,
    '.': 0xAD,
    '-': 0xAE,
    '…': 0xB0,
    '“': 0xB1,
    '”': 0xB2,
    '‘': 0xB3,
    '’': 0xB4,
    '♂': 0xB5,
    '♀': 0xB6,
    ',': 0xB8,
    '/': 0xBA,
    'A': 0xBB,
    'B': 0xBC,
    'C': 0xBD,
    'D': 0xBE,
    'E': 0xBF,
    'F': 0xC0,
    'G': 0xC1,
    'H': 0xC2,
    'I': 0xC3,
    'J': 0xC4,
    'K': 0xC5,
    'L': 0xC6,
    'M': 0xC7,
    'N': 0xC8,
    'O': 0xC9,
    'P': 0xCA,
    'Q': 0xCB,
    'R': 0xCC,
    'S': 0xCD,
    'T': 0xCE,
    'U': 0xCF,
    'V': 0xD0,
    'W': 0xD1,
    'X': 0xD2,
    'Y': 0xD3,
    'Z': 0xD4,
    'a': 0xD5,
    'b': 0xD6,
    'c': 0xD7,
    'd': 0xD8,
    'e': 0xD9,
    'f': 0xDA,
    'g': 0xDB,
    'h': 0xDC,
    'i': 0xDD,
    'j': 0xDE,
    'k': 0xDF,
    'l': 0xE0,
    'm': 0xE1,
    'n': 0xE2,
    'o': 0xE3,
    'p': 0xE4,
    'q': 0xE5,
    'r': 0xE6,
    's': 0xE7,
    't': 0xE8,
    'u': 0xE9,
    'v': 0xEA,
    'w': 0xEB,
    'x': 0xEC,
    'y': 0xED,
    'z': 0xEE,
    '$': 0xFF,
}
chars = [
    ' ',
    '0',
    '1',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9',
    '!',
    '?',
    '.',
    '-',
    '…',
    '“',
    '”',
    '‘',
    '’',
    '♂',
    '♀',
    ',',
    '/',
    'A',
    'B',
    'C',
    'D',
    'E',
    'F',
    'G',
    'H',
    'I',
    'J',
    'K',
    'L',
    'M',
    'N',
    'O',
    'P',
    'Q',
    'R',
    'S',
    'T',
    'U',
    'V',
    'W',
    'X',
    'Y',
    'Z',
    'a',
    'b',
    'c',
    'd',
    'e',
    'f',
    'g',
    'h',
    'i',
    'j',
    'k',
    'l',
    'm',
    'n',
    'o',
    'p',
    'q',
    'r',
    's',
    't',
    'u',
    'v',
    'w',
    'x',
    'y',
    'z',
    '$',
]

round1 = ([73, 97, 13, 41, 67, 101, 89, 139, 71, 83], [6969, 6367, 5099, 4591, 4421, 4831, 3581, 5039, 5279, 4079, 4021])
round2 = ([59, 181, 127, 163, 103, 163, 149, 193, 211, 151], [1337, 3701, 4603, 4663, 4703, 4219, 6481, 6983, 5407, 5297, 5099])
def one_round(string, coeffs, addends):
    assert(len(coeffs) == 10)
    assert(len(string) == 10)

    var32769 = addends[0]
    for c,n,x in zip(string,coeffs,addends[1:]):
        var32769 = (var32769 + charmap[c]) % 65536
        var32769 = (var32769 * n) % 65536
        var32769 = (var32769 + x) % 65536
    return var32769

def get_hash_for(string):
    var32771 = one_round(string, *round1)
    var32769 = one_round(string, *round2)
    return hex(var32771),hex(var32769)

all = len(chars) ** 10
for x in range(all):
    s = ""
    while x:
        s += chars[x % len(chars)]
        x //= len(chars)
    while len(s) < 10:
        s += "$"

    hash = get_hash_for(s)
    if hash == (0xB0EF, 0xD4B9):
        print(s)

final = 0x828E - round1[1][-1]
for x in range(10):
    for i, c in reversed(charmap.items()):
        if c == 0:
            continue
        if c % round1[0][-x] == 0:
            c //= round1[0][-x]
            print(c)
            break
    else:
        print("nope")
        exit()
    c -= round1[1][-1 - x]

# 0123456789 =
print(get_hash_for("0123456789"))
print(get_hash_for("$$$$$$$$$$"))
print(get_hash_for("ABABABABAB"))
print(get_hash_for("6969696969"))